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Self-generated time crystal in hybrid Josephson junctions by Nashaat, M.; Tekić, J.; Shukrinov, Yu. M. is a scholarly article available to read on EtoBox.

What is Self-generated time crystal in hybrid Josephson junctions about?

Time crystals represent a non-equilibrium state of matter with broken time-translation symmetry that repeats itself at regular time intervals. Though initially envisioned as a self-generated and self-sustained periodic motion, their realization has usually required the utilization of external periodic inputs or modulations. While at first it looked like, for a time crystal to exist, the initial proposal had to be abandoned, the recent evidence of inherent time crystals is bringing back the idea of self-generated time crystal under the spotlight. In this work, we demonstrate the appearance of a self-generated space-time crystalline order in hybrid Josephson junctions with the ferromagnet interface without any external influence. The presence of the exchange and the Dzyaloshinskii-Moriya interactions in a ferromagnet with broken structural inversion symmetry modifies the current phase relation and the critical current due to the coupling between the magnetic moment and Josephson phase. This breaks the time translation symmetry leading to the appearance of the time-crystalline order in the spatiotemporal dependence of superconducting current, which evolves with the double of the modul

Author

Nashaat, M.; Tekić, J.; Shukrinov, Yu. M.

Published

2025

Language

EN